Rotary hoe disk



H. e. TRAVER 2,575,321

ROTARY HOE DISK Filed July 26, 1942s '24 a 4 BY Q x I HTTORAEK Patented Nov. 13, 1951 UNITED STATES PATENT OFFICE Harry G. Traver, Cranford, N. J.

Application July 26, 1946, Serial No. 686,273

This invention relates to rotary hoes consisting of disks having forks extending radially from the periphery thereof and rotatably mounted on a shaft in spaced relation to each other.

It hasbeen the practice to make the disks and forks of separate parts and securing the parts together by suitable means, such as rivets, the forks being elongated angle members tapering in an arcuate direction to a point at one end and the opposite end portion straight and secured to the disk by rivets engaged in a side portion of the angle and the disk. Alternate fork members are secured to the opposite faces of the disk.

It is an object of the invention to make the disks and forks in one piece and by one stamping operation. 4

- It is another object of the invention to form radially extending ribs of channel shape in cross section in the disk with adjacent ribs projecting from the opposite faces of the disk and extending predetermined ribs projecting from the opposite faces of the disk into the forks to form the forks of channel shape in cross section simultaneously with.;the stamping of thedisk and forks.

It is a further object of the invention to form the forks with front and rear arcuate edges tapering to a point with the bottom of the channel of the forks terminating at the front edge inwardly of the point and the forks bent laterally from the face of the disk fromwhich the extended ribs project simultaneously with the stamping of the disk and forks andthe forming of the ribs in the disks.

Another object of the invention is to form the disk with a center opening and an annularflange extending from one face of the disk simultaneously with the stamping of the disk and forks and subsequently engaging a tubular member in said opening and flange and securing the tubular member to the disk and flange to form a hub portion.

A further object of the invention is to bevel the from edge of the forks to form a cutting edge.

Other objects and advantages of the invention will be described hereinafter.

In the drawing accompanying and forming a part of this application, Figure 1 is a side elevational view of my improved rotary hoe.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1 looking in the direction of the arrows.

Figure 3 is an arcuate cross sectional view taken substantiall on the line 33 of Figure 1 looking in the direction of the arrows to show the ribs in an intermediate portion of the disk.

5 Claims. (Cl. 97-217) Figure 4'is a view similar to Figure 3 taken-on the line 4-4 of Figure l to show the ribs adjacent to the periphery of the disk.

Figure 5 is an arcuate cross sectional view taken on the line 5--5 of Figure 1 looking in the direction of the arrows to show the channel shape of the portion of the forks adjacent to the disk.

Figure 6 is a view similar to Figure 5 taken on the line BB of Figure 1 looking in the direction of the'arrows to show the flat or straight shape of the pointed end of the forks.

' The embodiment of the invention as shown in the accompanying drawing comprises a disk I having an opening in the center thereof and an annular flange 8 formed of the material stamped from the disk to form said opening and extending from one face of the disk. A tubular member 9 is engaged in the center opening and the flange 8 with the opposite end portions of the tubular member projecting from the opposite faces of the disk and the tubular member is, secured in said position by suitable means, such as solder or a weld, applied to the adjoining portions of'the tubular member and the disk and flange, as shown at l0 in-Figure 2. The tubular member 9 constitutes a hub of the disk for rotatably mounting the disk on a shaft, not shown.

1 The disk is arranged with a series of ribs 01' channel shape in cross section extending radially from the flange 8 to the periphery of the disk with the adjacent rib extending from the opposite faces of the disk. As shown in Figures 3 and 4, every fourth rib ll extending from the opposite faces of the disk is of V shape in cross section, and the two intervening ribs 12 extend?- ing from the opposite faces of the disk are of arcuate shape in cross section.

There are provided integral with and extending from the periphery of the disk a series of forks [3 having a concave arcuate front edge [4 and a convex arcuate rear edge l5 extending in an are having a greater radius than the front edge so that the two edges merge into a point, as at Hi. The rear edge I5 of a fork l3 and the front edge [4 of the succeeding fork I3 merge in an arcuate edge II at the periphery of the disk I, as shown in Figure 1. To impart greater soil working effectiveness to the forks 13, they are formed to channel shape in cross section by extendingthe ribs ll of the disk 1 into said forks in an arcuate direction corresponding to the curvature of the rear edge l5 so that the'V- shaped bottom of the channel of the forks terminates at the front edge I4 at a point inwardly of the point I6, as indicated at l8 in Figure 1, to 

